Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
SOFT CARRYCOT
The design of this simple and quite affordable for the independent production of carrycot offers the Hungarian magazine", Earmaster". The upper rectangular frame, mounted in two racks...
VACUUM CLEANER-FAN
Forest dwellers often have difficulties in the processing of cranberries, blueberries, cranberries. But a great helper in this case may be an ordinary vacuum cleaner. You only need one...
